Support CORS

[ocomsoft]

I am far from an expert but while attempting to write a simple chat app in Vuejs to an existing running server I had to use a proxy to access the service

[ocomsoft]

I have created a VERY basic Vue App to use Gotify like a chat server as a proof of concept. https://github.com/ocomsoft/vhat
If we could configure CORS to allow certain addresses this code would not need to use the proxy stuff in vue.config.js and would talk directory to the Gotify server.

I hope this helps..

[jmattheis]

Thanks for your time, for making this app with Gotify (:

When you build Gotify in dev mode, then the headers will already be set see https://github.com/gotify/server/blob/master/router/router.go#L44 (dev mode would be just building Gotify with go build app.go). Also there is an issue for making the response headers configurable see #23

[ocomsoft]

Thank you. I would rather just use the configuration.

[ocomsoft]

No need for this to stay here when the #23 issue is fixed this would not be an issue.